Cosmetic mask



FIG. 1 is a front perspective view of a cosmetic mask;

FIG. 2 is a front view of the cosmetic mask, shown in a flattened position of use;

FIG. 3 is a rear perspective view of the cosmetic mask;

FIG. 4 is a right side view of the cosmetic mask;

FIG. 5 is a left side view of the cosmetic mask; and,

FIG. 6 is a front view of the cosmetic mask, shown in an environment of use.

In the drawings, the broken lines illustrate environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a cosmetic mask, as shown and described. 